Web Interface Freeze After Auto-Calibration

I just finished re-building my Rostock with a new Duet Wifi, 0.9° steppers, and a 24V power supply.

Everything is working perfectly and the improvement in print quality over the stock 1.8° steppers that came stock with the Rostock is incredible, especially when printing at small layer heights.

The only issue I am having is that the web interface freezes after the auto-calibration completes and tries to pull up the height map. The same thing happens if I try to load the height map and view it after reloading the web interface.

I am using firmware and wifi version 1.19 and web interface 1.15a and using Google Chrome, but the same errors present in Internet Explorer as well.

It appears that I was having an occasional probing error that was causing some of the errors, and I have fixed that issue. At this point, I can run the auto-calibration and the web interface will not freeze and the G-code console will report the adjustment, but when I try to load the heightmap the web interface will still freeze.